Method and means for purifying water for steam boilers



Dec. 26, 1922.

J. 0. REEKIE ET AL.

METHOD AND MEANS FOR PURIFYING WATER FOR STEAM BOILERS.

FILED FEB. 28,1917.

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Patented Dec. 2%, i922}.

JAMES D. BEEKTL'E, 0F DULUTH, AND GEOBGEM. GBOSSEN, OF MINNEAPOLIS, MINNESOTA.

METHOD ANDIZIEANS FDR EUEIFYING WATER,FOR STEA1 BOILERS.

Application filedl ebruary 28, .1917. Serial No. 151,458.

To all whome't may concern Be it known that we, James D. ,IREEIUE, a citizen ofthe United States, residing at Duluth, in the county of Louis and State of Minnesota, and Gnoncn M. CROSSEN, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State of Minnesota, have jointly invented new and useful Improvements in lilethods and Means for Purifying lVater for Steam Boilers; and we do hereby declare the tollowing to be a full, clear, and exact description of the invention, such as will'enalble others skilled inthe art to whichit appertains to make and use thesame.

Our invention relates to scale preventing means for steam boilers, and has for its object the precipitation and removal of scale tt'ormingininerals in the feed water before it has entered the main body of water in the boiler. Our method of preventing scale in the boiler, is to heat the feed water in a mineral precipitator within the boiler and to cause said heated feed water and the precipitates therein to flow from said precipitator into a settling tank outside of such boiler in which settling tank said precipitates (are collected and retained, and from whence the wateris returnedto the boiler. It has for a further object the trapping of oil accompanying the feed water, and the removal of such oil before it has entered the main body of boiler water. With these and other objects in view, it consists of, the method and the means, constructions, combinations and arrangements of parts here inatter described and claimed. i i

In, the drawings, the figure is a vertical,

" charge t downward into sald conductor. If

desired one or more other water tables as 95 longitudinal central section of a furnaceand boiler in which our invent-ion is employed. a In the drawings, l is a boiler, mounted on a furnace of any suitablestructure, as one provided with outer walls 2, a grateB, and a bridge wall 9 said boiler are any suitable number of fire flues 1*. One end of said boiler ei tends into a gas combustion chamber 4L, of said furnace, from which theheated gases enter said fines, and the opposite end of said boiler extends into a smoke box 5 of any suitable construction, into which the burnt gases and smoke are discharged from said flues. The normal surface of the main body of water within said boiler is represented by the line A-B, the level of which may,

ed to dischargefreely into saidcup.

Extending through however, fluctuate under various conditions. Above sa d water is a steam space 6. Positioned within said boiler, withits upper end preferably a short distance below the normal said boiler and furnace and into the upper end of a settling; tank 8 into which it discharges. Extending into said settlingtank a tor nearits upper end is an overflow pipe 9, which is connected at its opposite endto the blow-off pipe 10 of said boiler, thus the excess water from the settling tank may flow into the boiler through said blow-oil pipe.

ofany suitable structure, as 7 andin said pipe 9is a shut-off valve of any suitable structure, as 9.

Positioned above sald cup 7, and extending at its open upper end into said steam space and atits lower open end lntosaid cup is a water conductor 11, of any suitable structure, I preferably tunnel-shaped, with its smaller end ,down. Sald conductor is adapttendinp; intosaid boiler from an ejector pump (notshown, but well ,known to the art) or from any suitable external source of water supply, is an 1n ector or water teed pipe 12 which is preferablyadapted to discharge upon a water table 13 positioned above or within said conductor, which table is adapted to spread the water and dislowerend of said conductor terminates ,a 0

short distance above the lower end of said 011p, which cupis preferably kepttilled with Water from said ,conductor and from the Thus main bod of water in said boiler.

the lower end of the conductor 11 will normally be water sealed, and any oil which may appear in the feed water will thereby be trapped in said conductor, but any scale forming minerals will be granulated by the heat and will drop into the. cup and be car- In said pipe '7 is a faucet or blow-oit valve 7 5 ried off by the drain pipe to the settling tank. At the same time any surface impurities in the main body of boiler water may be drawn into said cup, which thus also operates as a skimmer. The oil may bedisposed of occasionally by closing the valve 3) and opening the faucet or blow-cit valve 7*, thus permitting the oil to be blown through the pipe 7 and out through the Valve 7".

While we have thus described a funnelshaped cup and conductor, we do not desire to be limited to that form, or to any particular number of water tables except as to such claims wherein, it any, such form or number are particularly specified. v

In operation, the feed water is highly heated by the passage of the reed pipe through the boiler, and by the flow of the water through the steam and over the steam heated water tables and through the conductor and cup. The heat operates to crysrtalize, or granulate or precipitate the scaleforming minerals or other heavy impurities in the water, which settle in said cup and are drawn off to the settling tank.

It will be obvious that'said structure may be modified in form and in minor details within the scope and spirit of certain 01 our clalms.

What We claim is- 1. The method or" purifying water for steam boilers, consisting of causing the precipitation of scale-forming minerals'in the feed water by heating the teedjwater within the boiler before said feed water has mixed with the main body of boiler water, trapping the oil from said vfeed water within the boiler before either said oil or said feed water have mixed with the main body of boiler water, drawing said feed water and mineral precipitates out of said boiler free from said oil, trapping said mineral precipitates outside ,of said boiler, returning the feed water approximately free of said precipitates to the main or free body of water within the boiler, and occasionally blowing said trapped oil out of said boiler.

2. The combination with a steainboiler, of a feed water receptacle positioned therein, said receptacle comprising a compartment open at the upper end and extending at the upper end below the normal level of the main body of water insaid boiler, a second compartment terminating at its lower end within the first said compartment, the lower end of said second compartment extending 'below the normal level of the main body of water within said boiler, the upper end of said second compartment extending above the upper end of the first said compartment and above the normal level of the main body of water in said boiler, said second compartment being adapted to discharge through its lower end into the first said compartment said first compartment being also adapted to receive water at its upper end from the main body of water in said boiler, a feed pipe extending into said boiler, said feed pipe being adapted to discharge into said second compartment, a discharge pipe communicating at one end with the lower end of said first compartment and extending outside of said boiler, means interposed between the outer end of said discharge pipe and said boiler for delivering the discharge water to the main water chamber within said boiler, and a blow-cit cock communicating with said discharge pipe outside of said boiler.

3. The combination'with a steam boiler oi a feed water receptacle positioned therein, said receptacle comprising a compartment open at the upper end and extending at the lower end below the normal level of the main body of water in said boiler, a second compartment terminating at its lower end within the first said compartment, the lower end or said second compartment extending below the normal level of the main body of water withinsaid boiler, the upper end of said second compartment extending above the upper end of said first compartment and above the normal level of the main body of water in said boiler, said second compartment being adapted to discharge throughits lower end into the first said compartment, said first compartment being also adapted to receive water from the main body of water in said boiler, a "feed pipe extending into said boiler,said feed pipe being adapted to discharge into said second compartment, a discharge pipe communicating at one end with the lower end of said first compartment and extending outside of said boiler, and a blow-off cock communicating with said discharge pipe outside L of said boiler.

In testimony whereof, we hereunto afiix our signatures in presence .of two' witnesses.

JAMES D; BEEKIE. GEORGE M. CROSSEN. lVitnesses:

J. M. SUnnIvAn, RALPH HENRY DAY. 

